A CacheInvalidationPolicy is used to set objects in TopLink's identity maps to be invalid
following given rules. CacheInvalidationPolicy is the abstract superclass for all
policies used for cache invalidation.
By default in TopLink, objects do not expire in the cache. Several different policies
are available to allow objects to expire. These can be set on the ClassDescriptor.

CacheInvalidationPolicy

setShouldUpdateReadTimeOnUpdate

Set whether to update the stored time an object was read when an object is updated.
When the read time is updated, it indicates to TopLink that the data in the object
is up to date. This means that cache invalidation checks will occur relative to the
new read time.
By default, the read time will not be updated when an object is updated.
Often it is possible to be confident that the object is up to date after an update
because otherwise the update will fail because of the locking policies in use.

shouldUpdateReadTimeOnUpdate

public boolean shouldUpdateReadTimeOnUpdate()

Return whether objects affected by this CacheInvalidationPolicy should have
the read time on their cache keys updated when an update occurs.